Four pair cable test set

Details Four pair cable test set Four pair cable test set

1986-03-31

1987-10-27

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of trunk or long line

324 66, H04B 346

Patent

active

047034971

ABSTRACT:
The methods and apparatus for checking the operability of eight conductors simultaneously including four pair cable which may be connected to any of several types of electronic or electromechanical telephone systems. The apparatus is connected directly to the cable by utilizing a modular four pair jack and plug. Said apparatus may be used by connecting directly to a phone system and observing LED illuminations configured by operating any one of four switches individually or simultaneously. In addition, pre-service wiring can be tested by using shorting plugs or LED shorting plugs on the opposite end of the cable that is connected to the test apparatus. The tests and methods will indicate opens, shorts, polarity reversals and wire transposition by LED illuminations and warble tone which is generated out over the cable pair. This test apparatus is compatible with most existing telephone systems, from the oldest key system to the latest electronic PBX switches. The device is self powered by a nine volt battery. All of the components are disposed within a hand held, pocket sized case.

REFERENCES:
patent: 4575588 (1986-03-01), Vande Ugver
patent: 4596904 (1986-06-01), Messenger

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